html,body{
	height: 100%;
}
#app{
	display: flex;
	height: 100%;
	width: 100%;
	flex-direction:column;
	
}
header,footer{
	height: 46px;
	line-height: 46px;
	text-align: center;
	background-color: #C8C9CC;
	
}
section{
	flex: 1;
	overflow-y: scroll;	
}

